Roller chain sickle



Dec. 8, 1942. o. P. HuRsT n ROLLER CHAIN SICKLE Filed April 8, 1941Attorney has for its primary o Patented Dec. K8, 1942 .UNITEDsTATEsQPATE Nr oil-Fics ROLLER sicuri.

Oliver P; Hurst, Mooreland, Okla. Application April mil semina. 387,5

` '-(ctf sis-.291)k ,y E y ,portions ofg, tubular ,bear-in 1 Claim.

The present inventi and useful improvem mowing machines, re

ents in endless sickles for apers, harvesters, etc., and

as hereinafter set fort acier embodying a no rangement whereby m abilitywill be attain minimum.

Another very important object of the invention is to provide a sickle ofthe aio 'ementioned character which is operablewith e generalsatisfaction in eithe Another important object of provide a roller chainsickle of scribed of such construction as tially no obstruction materialthereover.

Another object of th a cutter bar of uni endless roller cha Other .objects a roller chain sic direction. the invention is to to oier substantothe passage of the cut e invention is to provide que construction onwhich the in sickle is operable. y of the invention are to provide kleof the aforementioned character which Will be comparatively simple inconstruction, compact tured at low cost.

All of the foregoing and still-further objects and advantages of theinvention will become apfrom a study of the following specificaken inconnection with the accompanying drawing wherein like characters ofreference designate correspond several views, and w Figure 1 is a topplan view of a portion of a roller chain sickle constructed inaccordance with the present invention, showing one of the bladesseparated from the chain Figure 2 is a view in vertical longitudinalsection, taken substantially on the line 2-2 of Figure 1.

Figure 3 is a top plan view of an intermediate portion of a cutter baron which the sickle is operable, portions of said bar being omitted, theguards being shown in horizontal section.

Figure 4 is a cross sectional view through the cutter bar with thesickle mounted thereon.

Referring now to the drawing in detail, it will be seen that referencenumeral I designates generally a roller chain, which chain is to beendless. 'I'he chain I comprises what may be referred to as alternating,pivotally connected units or sections A and B. The sections A includesvertically spaced, horizontally extending upper and lower links 2 and`3, respectively, having apertured end portions 26 in which reduced endherein on relates generally to new f the character de` bject to provide,in a manner, h, a device of this char vel construction and ar` aximumstrength and dured and wear reduced to av ual emciency and in anydesired ing parts throughout the tively,

v jecting forwardly therefrom comprise vlinks `6"w gs I are fixed.Journaled on the bearings fforrotation between the 2 and 3 are tubularyrollers 5. f The reduced end portions`26 of the bearings I provideshoulders 21 which,y the links 2x and 3 abut.

`ifhe sections B connect the sections A and hich extend beneath the endcent links 3. -Fixed in the links 6 and rising therefrom l :which arejournaled in the bearings 4.

Mounted `on and, connectin portions of the pins 'I are bl rvtially theshape shown to ad of `the drawing. `The blade metal, and have formedther 9 which accommodate the pins l. 'I'he blades 8 furtherincludesubstantially v-shaped, forwardly projecting front portions I0provided with vcutting edges Il. As best Seenin Figure 2` of thedrawing, the blades\`\reston the upper ends of cheibeanngs .a maken the@inks 2. Cotter pins I2 are provided intlhe upper end portions of thepins 1 for retainingy the blades-8.

The endless sickle thuslfar described is'op"erable on acutter bar I3.iThe cutter bar \I3 is to be provided, on its exi portions, with suittheaforementioned sprocke may beconnecte `front and back portions of thebar I3 are led of `angular cross secti lie bar I4 and proablehorizontally' niounte sprockets around manner to a ger plates l and I5,respecneath the forward portion oi t are guards I6.

g the v'upper end ades 8 of substanvantagein Figure 1 s are of suitableeinspaced openings which' the endless.' chain I trained.` One sburce ofi power. Mounted on the on. Mounted be- Mounted beneath the rear returnhousing I'I of angular in conjunction with, the ve ledger plate. I5,deiines a flight of the chain I.

the ledger plate I4 and the on the bar Il.

In operation, the sections A and B of the chain guards I6 in position 25secure the clips 24,`

1 turning in the tubular bearings 4. Thus. there is nol relativemovement between the pins 'I and the bladesy B and consequently no wearoccurs at their points of contact. As the chain I travels around theaforementioned sprockets on the end Y portions of the cutter bar, therollers l turn on the bearings 4. The shoulders 21 positively preventbinding of the tubular rollers B between tne-` links 2 and 3, thuspermitting said rollers to turn freely on the bearings l. 'I'heconstruction 'and arrangement is such that the sickle will function withequal emclency when drivenin either di `rection. By removing the cotterpins I1 frommthe pins 1 of the chain l, the blades I may beexpeditiouslyremoved for travel on the upper portion of the ledger plate I5 and theportion Il of the housing I1.

It is believed that the many advantages of al roller chain sickleconstructed in accordance with the present invention will be readilyunderstood and although a preferred embodiment of Athe de-V y 1- platesof said alternate units.

vice is as illustrated and described, it is to be unf derstood thatchanges in the details of construction and in the combination andarrangement of parts may be resorted to which will fall within the scopeofc-the invention as claimed.

sharpening or replacexfnent.` The blades of the return flight ofVthechainl f bodying a lower-link, pins rising from the respec-` 15` 1the fkaforementioned bearings of said alternate vsections for pivotallyconnecting said alternate What is claimed is:

An endless sickle comprising a plurality of pivtermediate sectionspivotally connecting said altematef sections together -and respectivelyemtive opposite ends of such link and liournaled in and' intermediatesections together, and an upper memberin the iormof a blade havingapertures Vreeeivirxg the upper endsfof said pins, and retainingelements on the `upper ends ot said pinsA retain said blades in aposition o! rest on the upper ends of vthe bearings and on the upper v'ouvER P. HURs'r.'

